Wŏnmyŏng (圓明) is a religious magazine published in 1926 by Gwanseonggyo (關聖敎), now preserved only in a few institutions, including the National Library of Korea. The magazine presents a structure integrating doctrine, organization, regulations, and rituals, demonstrating how Gwansonggyo simultaneously pursued the systematization of its teachings and the institutionalization of its organization. Its bilingual composition in Korean and Classical Chinese reflects the adaptation of modern print culture and the popularization of religious language, marking a turning point in modern religious publishing that expanded the medium of faith “from scripture to magazine.” As a complex text encompassing the transformations of 1920s Korean print culture, religious movements, and language policy, Wŏnmyŏng serves as a significant source for future studies on modern Korean religious culture, print history, and mass media development.